Here’s a soothing color palette that features light blue as the background color, along with complementary colors to maintain a harmonious feeling for your characters in yukata.

json
{
  "palette_name": "Soothing Harmony",
  "colors": [
    {
      "name": "Light Sky Blue",
      "hex_code": "
                            
                            #87CEEB
                        "
    },
    {
      "name": "Soft Lavender",
      "hex_code": "
                            
                            #E6E6FA
                        "
    },
    {
      "name": "Pale Mint Green",
      "hex_code": "
                            
                            #98FF98
                        "
    },
    {
      "name": "Peachy Pink",
      "hex_code": "
                            
                            #FFCCCB
                        "
    },
    {
      "name": "Misty Rose",
      "hex_code": "
                            
                            #FFE4E1
                        "
    }
  ]
}

This palette incorporates light blue as the primary color, complemented by soft lavender, pale mint green, peachy pink, and misty rose for a soothing and harmonious theme.

Do you have any specific colors in mind for the yukata, or would you like suggestions based on this palette?